Calculating the Fraction of Biomass in the Mixed Liquor Volatile Suspended Solids (MLVSS)

Related Calculators

Overviews

Calculating the Fraction of Biomass in the Mixed Liquor Volatile Suspended Solids (MLVSS)

Below you can find the typical formulas, coefficients and empirical data used to establish the basic design of a complete mix suspended growth biological sewage wastewater process.

To use this calculator please fill in the input value data of your sewer wastewater and as a result some basic plant design and effluent BOD data will follow out of the calculations. If the normal sewer water characteristics are unknown, please press the "typical data" button for an autofill of the input fields.
More information and theory about the Input Parameters and the Kinetic Coefficients you can find in the Documentation.

Characteristics of Primary Sedimentation Effluent
influent soluble substrate concentration (bsCOD)	S₀ =	BOD or bsCOD g/m³
nbVSS concentration in influent	X_0,i =	g/m³ or mg/l
Solids Retention Time (SRT)	SRT =	d

Kinetic Coefficients
maximum rate of soluble substrate utilization	k =	g COD/g∙d
biomass yield	Y =	g VSS/g COD used
endogenous decay coefficient	k_d =	g VSS/g VSS∙d
half-velocity constant	K_s =	g COD/m³
fraction of biomass that remains as cell debris	f_d =	g VSS/g VSS



The fraction of biomass in the MLVSS is:	X/X_T =	g VSS/g bsCOD

Documentation
This formula will establish the Fraction of Biomass of an sewer wastewater treatement plant:

Where:

[ Home ] [ Back ] [ More Info ]

!!! Lenntech BV cannot be held responsible for errors in the calculation,
the program itself or the explanation. For question or remarks please contact us.

Copyright © 1998-2008 Lenntech Water treatment & air purification Holding B.V.
Rotterdamseweg 402 M
2629 HH Delft, The Netherlands
tel: (+31)(0)15 26.10.900
fax: (+31)(0)15 26.16.289
e-mail: info@lenntech .com